The 30-degree ruler is broken, but it doesn't affect drafting. In fact, because it's broken, it's more maneuverable and easier to use. Transparent plastic set square set with measurement holes. - Set includes: 2 set squares, storage case - Material: Transparent plastic - Size: Each ruler has angles of 90 degrees, 45 degrees, and 30 degrees - Features: Design with measurement holes - Brand: STAEDTLER Thank you for viewing.